Fix policy evaluation not happening upon creation or update of individual components

[fupgang]

Description

Fixes #4373 as suggested in the issue.

Addressed Issue

#4373

Additional Details

The test PolicyEvaluationTaskTest does not exactly check the fix.
But I found it valuable since there seems to be no test case yet for PolicyEvaluationTask. I used it to study the behavior, it asserts another aspect.

Checklist

• I have read and understand the contributing guidelines
• This PR fixes a defect, and I have provided tests to verify that the fix is effective
• This PR implements an enhancement, and I have provided tests to verify that it works as intended
• This PR introduces changes to the database model, and I have added corresponding update logic
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.08% (target: -1.00%)	✅ 100.00% (target: 70.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (3c265ed)	22579	17852	79.06%
Head commit (dc48389)	22579 (+0)	17871 (+19)	79.15% (+0.08%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#4374)	2	2	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[nscuro]

Good catch, and thanks for the fix!